Excerpt from A New Gas-Oxygen-Ether Apparatus: Description and Use of the Instrument
Description of Apparatus (see Fig. - A graduated ether reservoir of about one ounce capacity is seen above and in the center. This is controlled by a pin valve (1) which allows the ether to p... ass drop by drop through the sight feed whence it falls into the vaporizing chamber through which a stream of all the used gases are made to pass. A small Opening closed with a screw cap (4) is used for filling the ether cup, while a pet-cock (5) in the dependent part is used to empty it. At the lower part of the instrument are four yokes; two on the right to accommodate two 100-gal. Nitrous oxide cylinders, and two on the left (6a) for two 40-gal. Oxygen cylinders. These yokes are strongly connected to a solid brass seg ment which is tunneled on each side so that the gas from both cylinders may pass through it and upward through the high-pressure pipe the oxygen taking a similar course on the left, thence entering the reducing valve the oxygen passing through the Opposite valve (9a). From these valves the gases pass through the low-pressure tubing (10, 1oa) to the final control cocks. A low pressure gauge of 30 pounds capacity is attached on each side (11, 11a), distal to the regulators, to indicate the pressure against these icontrol cocks. The circular plates (12, iza) are immovably at tached to the stem of these cocks. A calibration ap pears on the upper part, which is read from a fixedindicator point (13) in the center at the top of each, in terms of liters per minute of the gas delivered to the rebreathing bag. On the lower side of this cir.
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